NGC7023 The Iris Nebula (Edward Overstreet)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD200775 · Iris Nebula · LBN 487 · LDN 1174 · NGC 7023

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NGC7023 The Iris Nebula

Link: https://www.youtube.com/@nightskyimaging/streams

Link to TIFF/FITS: http://www.nightskyimager.com

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NGC7023 The Iris Nebula

Link: https://www.youtube.com/@nightskyimaging/streams

Link to TIFF/FITS: http://www.nightskyimager.com

NGC 7023, also known as the Iris Nebula, is a reflection nebula located in the constellation Cepheus. Unlike emission nebulae (such as the previously mentioned Dumbbell Nebula) that glow due to the ionization of gases by nearby stars, reflection nebulae shine by reflecting the light of nearby stars.

The Iris Nebula gets its name from the prominent dark feature at its center, which looks like an iris of an eye. The dark patch is actually a dense cloud of dust that obscures the background starlight. Surrounding this dark core is a region of gas and dust that reflects the light from nearby stars, creating a stunning blue glow.

The distance to the Iris Nebula is estimated to be around 1,300 light-years from Earth, which places it relatively close in astronomical terms.

The Iris Nebula is associated with a young star cluster located within it. The light from these young, hot stars is what gives the nebula its characteristic blue glow.
Reflection nebulae like NGC 7023 are relatively short-lived in astronomical terms. Over time, the young stars illuminating the nebula will move away from their birthplace, and the nebula will gradually disperse.

I exposed the IRIS for 17 plus hours over 4 nights...I first begin gathering data in mid June and finished it this past week.

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	8155024
PixInsight job	1YFY4YAWNRK50O7UMJLE0M328NUGGXL7
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h01m24s.999
RA (top/left)	21h04m08s.689
RA (top/right)	21h01m57s.234
RA (bottom/right)	20h58m40s.326
RA (bottom/left)	21h00m53s.602

Dec (center)	+68°11′32″.75
Dec (top/left)	+68°06′49″.65
Dec (top/right)	+68°27′11″.92
Dec (bottom/right)	+68°16′05″.50
Dec (bottom/left)	+67°55′53″.16

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NGC7023 The Iris Nebula

NGC7023 The Iris Nebula

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NGC7023 The Iris Nebula

NGC7023 The Iris Nebula

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